296 = na + 8 288 = na n divide 288 = 2^5 ·3²
656 = nb + 8 648 = nb n divide 648 = 2³ ·3^4 ⇒ n divide 2³ ·3² =72
a) 296 : 72 = 4 r = 8
656 ÷ 72 = 9 r =8
b)296 = 24·12 + 8 656 = 24·27 + 8
296 = 12·24 + 8 656 = 12·54 + 8
296 = 18·16 +8 656 = 18·36 + 8
296 = 36·8 + 8 656 = 36·18 + 8